Évolution paléogéographique et structurale du basin de paris, de Précambrien a l'actuel, en relation avec les régions avoisinantes

Abstract

The Paris Basin was born in a late Proterozoic palaeorift, obliterated in the Brioverian by detritic sediments and in the Carboniferous by granitic batholiths. After the Variscan orogenesis and the Permo-Triassic peneplanation, the Paris Basin became, during the Jurassic and Cretaceous, the intersection of three seas where the influences of the Mesogean, the North Sea, and the Protoatlantic met. Subsidence persisted in the Palaeogene where the mobility of the palaeogeography is a structural detector of the Pyrenean and Alpine tectonic phases. At the same time, a north-south undulation developed,200 meters in amplitude and 200 kilometers in wave length, which displaced the pole of negative epirogenesis from the region of Compiegne to south of Orleans. After the stabilization at the end of the Miocene and the strong positive Plio-Pleistocene epirogenesis, some neotectonic indications are the first signs of a Holocene reactivation of the subsidence in the center of the basin.